Draftsman s easel



(No Model.) 1 2 Sheets-Sheet 1 E. 'DUMMER..

v D-RAFTSMANS EASBL. No. 418,866. PatentedJan. '7, 1890.

Infantoqg Q WM N. PETERS, Pholo-Lflhogra har. Waihingtnn. QC

2 b e e h S .w e e h s 2 L -HNM. A EB N A Mv DS T R D (No Model.)

Patented Jan. 7, 1890".

InVenZw r;

UNITED. STATES PATENT Demon.

EDWARD DUMMEROF BOSTON, MASSACHUSETTS.

DRAFTSMANS EASEL.

SPECIFICATION forming part of Letters Patent No. 418,866, dated January '7, 1890.

Application filed February 23, 1883. Serial No. 85,931- (No model) 7 T all whom it may concern.-

Be it known that I, EDWARD DUMMER, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Draftsmans Ease], of whichthe following is a specification, reference being had to the ac a draftsmans easel embodying two important features, or either of the two -namely, first, a drawing-board so held and pivoted that it may be inclined at any desired angle, be confined to the plane of inclination, and be revolved in its own plane when so inclined; second, an adjustable supporting-frame for a drawing-board, whereby a, drawing-board of any desired size maybe firmly clamped in place in a manner suitable for the work and instruments of adraftsman.

My invention consists in a draftsmans easel accomplishing said object, and in the construction and combination of parts of the device, as hereinafterset forth, and specifically pointed out in the claims.

In the drawings-two sheets-Figure 1 is, a plan view of the easel gas adapted to be clamped on a table or like structure, and without the elevating-screw. Fig. 2 is a side view of thesame. Figs. 3 and 4 are two views of the piece formingthe two plates 0 and D. Fig. 6 shows the elevating-screw; and Figs. 5 and 7 are illustrative of modifications hereinafter specified.

To a base A is attached by suitable means a plate B. Thisbase is adapted, as by means of an arm and the screw a, or other ordinary contrivance,.to be clamped on a'table or like structure. The plate B has a face in a vertical plane, against which is another plate 0. A pin 19, or stud, forms a pivot, so that the plate 0 may be rotated in a vertical plane.

By means of a nut and hand-Wheel or piece 0, screwing on the pin b or stud, the plate 0 may be so pressed against the plate B as to be held firmly in the desired position. To the plate 0 is rigidly connected a plate D, having a face in a plane at right angles to the plane of the contiguous faces of the plates 13' and 0. Against the plate D is another plat-e E. There is a pin dor stud, forming a pivot, so that the plate E may revolve on the plate D. A nut or hand-wheel or piece e screws on the threaded pin d or stud, so that the plates Each rod or bar may be clampedfirmly in any desired position on its arm by means of a bolt or screw and nutf. Each of the rods or bars I and J has a projection or lip g, which extends onto the edge face of the drawingboard, which is represented by dotted lines.

A similar projection or lip h is pivoted to the rod or bar K, and has -a screw 2' connected therewith, so that this projection or lip may. be swung and pressed against the other of the two opposite edge faces of the board.

It is very desirable that the projections or lips g h should not only not extend above the plane of the upper surface of the drawing board, but should not reach quite to this surface, as illustrated in the drawings, in order that they will not interfere with the free use of the draftsmans instruments, especially the T-square. For this reason I make these projections or lipsofa length equal to only a part of the thickness of the thinnest drawingboards commonly used. There are raised bearing-surfaces j near the ends of the rods or bars I, J, and K, so that the board will bear evenly and be held steadily.

Any one 'of drawing boards of various widths, ranging from one that is quite wide to one that is quite narrow and of any length, may be placed on the rods or bars. bars are slid on the arms and the projections or lips g brought up to one edge face of the board, and the projection or lip h to the oppo- The rods or bars are .then' that the board is clamped very securely and firmly in place.v By means of the plates B and O and the pivot and nut thereat the board The rods or may be swung to any desired inclination and firmly secured in such inclined plane. By

the board may be revolved in its own plane while confined to the inclined plane, and by the nut a may be firmly held in any position obtained by such revolution.

There may be more than the three arms F, G, and H, and rods or bars to slide thereon; but it is believed that three arranged as shown are preferable.

The purposes of the plates, pivot-pins, and nuts are to provide for movements about two pivotal lines which are at right angles to each other and to clamp the parts in the desired positions. These results may be attained by devices somewhat different in construction. One modification of this partof the invention is illustrated in Fig. 5. The support L has a horizontal pintle 7. attached thereto, upon which a connecting-piece M may swing. A piece N, which is joined to the board or arms for supporting the same, has a pintle Z set at rightangles to the pintle k, which may revolve in the connecting-piece M. Set-screws m may be employed with this arrangement to prevent the pintles from turning, and hence to clamp the parts.- I

I have shown in Figs. 1 and 2 the plate B as rigidly fixed to the base and clamping device A; but to provide for placing the drawing-board at any desired elevatlon the plate B may be joined to a spindle O, which hasa screw-thread formed thereon, as shown 1n Figs. 6 and '7. On this screw works a nut P,- having, as one piece therewith,a hand-wheel. The nut P rests on a support, which may be a projection Q of the base and clamping device A. It may be desirable to employ parts of the invention with a support resting directly on the floor. enter and the nut P rest on a standard R, which may be a part of such support.

I am aware that it has been proposed to make a carriage-painters easel 011 which a carriage-body may be temporarily secured to arms and by which the carriage-body may be inclined and revolved in plane of inclination. Such easel has, however, no pro vision whereby the parts, which are pivoted to each other and by which the carriage-body may be revolved in plane of inclination, maybe clamped firmly to each other, as by means of a screw, so that the arms or supports for the carriageb'ody may, with respect to the movement at this pivot, be rigidly and steadily held. In my easel the arms or upper support may be rigidly clamped to the intermediate or connecting piece whenever desired, so that-the latter being rigidly clamped to the base or lower supportsaid arms or upper support, and hence the board fastened thereon, will be firmly and steadily held. This is necessary at times in order that the draftsmans work may be successfully and accurately executed.

I claim as my invention 1. The combination of rods or bars provided at their outer ends with lips or projections to bear against the opposite edge faces The elevating-screw may,

of a drawingboard, a central supportingpiece, and a clamp for clamping each of said rods or bars to said central supporting-piece. there being as many clamps as there are of said rods or bars, substantially as and for the purposes set forth.

2. The combination of rods or bars provided at their outer ends with lips or projections to project onto the edge faces of a drawing-board, a central supportingpiece provided with ways or guides for said rods or bars, and clamps for clamping said rods or bars firmly on said ways or guides, substantially as and for the purposes set forth.

3. The combination of rods or bars provided at their outer ends with lips or projections to press against the opposite edge faces of a drawing-board,- a central supportingpiece provided with a way or guide for each of said rods or bars, and clamps to firmly secure said rods or bars on said Ways or guides,

there being a clamp for each of said rods or bars and operated independently of the others of said clamps, substantially as and for the purposes set forth.

4. The combination of rods or bars, one of which is provided with a movable lip, and means for forcing thesaid lip against the edge face of a drawing-board, and each of the other rods or bars provided with a lip 01 projection to project onto the edge face of the drawing-board, a support for said rods or bars, and a clamp for clamping each of said rods or bars to said central support, substantially as and for the purposes set forth.-

5. The combination of a central support provided with radiating arms F G H, firmly fixed thereto and provided with guiding-ways, rods or bars fitted to said Ways, whereby they are guided in an endwise movement thereon, and clamps for clamping said rods or bars firmly to said arms, there being a clamp for each of said, rods or bars operated independently of the others of said clamps;

6. The combination of a plate E,- adapted to be secured to a drawing-board and in a plane parallel therewith, a plate D, parallel with the plate E, a plate G, joined to plate D, a plate B, parallel with plate C, devices,- as studs or pins 1) and d and nuts 0 and e,- for pivoting and clamping said plates, and a support fixed to plate B, maintaining the face of this plate in a vertical plane, the adjacent faces of the plates B and 0 being at right angles to the adjacent faces of the plates D and E, substantially as and for the purposes set forth.

7. In combination with the arms or upper support providing means for clamping a drawing-board by pressure against its edge faces, a base or lower support,- and an intermediate or connecting piece, two pivots providing for inclination of said upper support and revolution of the same in plane of inclination, and means, including a screw, whereby said upper support maybe rigidly clamped to the 'intermediate or connecting piece, substantially as and for" the purposes set forth.

v "8. In combination with the arms or upper support, providing means for clamping a drawing-board by pressure against its edge faces, a base or lower support embodying a clamp, and an intermediate or connecting piece, two pivots providing for inclination of IO said upper support and revolution of the same in plane of inclination, and means, ineluding a screw, whereby said upper support may be rigidly clamped to the interlnediate or connecting piece, substantially as and for the purposes set forth.

' 4 EDWARD. DUMMER.

Witnesses:

ALBERT L.,LINcoLN, J r., WM. H. DRURY. 

